Dbilling and bobing machine



- S. W. SHRYOCK.

Metal Drill.

Patented Nov. .6; 1855. 7

N. PETERS. Pholoflmhu hu Washinglon. D. c.

UNITED STATES PATENT OFFIfiE.

SAML. W. SHRYOGK, OF I-IOPKINSVILLE, KENTUCKY.

DRILLING AND BORING MACHINE.

Specification of Letters Patent No. 13,766, dated November 6, 1855.

To all whom it may concern:

Be it known that I, SAMUEL l/V. SHRYooK, of Hopkinsville, in the countyof Christian and State of Kentucky, have invented a new and usefulImprovement in Drilling and Boring Machines; and I do hereby declarethatthe following is a full, clear, and exact description of theconstruction and opera tion of the same, reference being had to theannexed drawing forming part of this specification, in which Figure 1 isa front elevation of the ma chine, and Fig. 2 a section through the axisof the boring shaft and line a: w of Fig. 1.

Similar characters of reference in the several figures denote the samepart of the machine.

The nature of my invention consists in combining in a manner hereafterto be described, the rests upon which the article to be bored is placedand the revolving drill;

so that the said rests may rise with any degree of velocity as theboring progresses, by the action of the drilling mechanism, and at thewill of the operator; the rests being capable of removal at will, sothat articles of various forms and dimensions may be operated upon, bythe attachment of the proper rests, the power being steam, animal ormanual, as may be desired, the precise construction and operation beingas follows: A suitable frame A having been constructed the drill shaft13 is arranged perpendicularly in bearings with the drill or bit 0pointing downward as shown in the drawings, A shaft C, is also insertedin its bearings, horizontally and at right angles to the shaft 13, towhich it is geared by the bevel wheels a b or their equivalents. It isdriven by power applied through a band passing over the pulley D, or bymanual power applied to the crank I as occasion may require, A thirdshaft E is placed horizontally behind the upright which supports thedrill shaft, and has leaves, or a small pinion 2) upon it which playsinto a rack F, moving up and down, and guided in a slot Z. A cap piece mwhich supports the rests n n is attached through said slot to, and holdsthe rack in place. A pulley H provided with a series of grooves e e,&c., whose diameters increase in'order, is fixed upon the shaft E whilea loose pulley G having a similar series of correspondingly diminishinggrooves e e, &.c., is placed upon the driving shaft C. A band (l,connects the pulleys moving in. such of their grooves as will give thedesired speed to the shaft E. A disk 9 is connected with the loosepulley G by a tube or hollow shaft 8 surrounding the shaft .0, and isprovided with pins 2' i projecting a little distance parallel with itsaxis. A lever f fits over the tube 8 and has one end attached by a jointto some part of the frame A while the other end is left free to be movedas desired for the purpose of sliding the pulley G on its shaft tocouple it thereto, or uncouple it therefrom. A pin it projectsperpendicularly from the shaft 0, in such a position that the pins 2' zof said disk may be brought against it and thus couple the pulley G tothe shaft C.

lVhen the driving shaft C is turned the drill or bit 0 revolves and bycoupling the loose pulley G to its shaft as above described, the articleto be bored (which is placed upon the rests n n) is moved upward againstsaid drill or bit with a velocity compared with that of the bit, varyingaccordi'ig to the particular grooves of the pulleys G H, in which theband (Z runs. As soon as the article is'bored through or to the requireddepth, the pulley G is uncoupled from its shaft, and the rests n a withsaid article 'fall by their own weight, without requiring the drivingshaft to be stopped, or its motion reversed, and then the loose pulleyis again coupled to its shaft, and the article again bored as before.

Having described my invention and the operation of the same, what Iclaim my invention and desire to secure by Letters Patent is Supportingthe rests nby rack F and pinion 10 of shaft E and combining the samewith movable and fixed pulleys G and H as herein set forth, so that therests may be moved upward with any required velocity, or be dropped fromthe drill, at the will of the operator, during the revolution of theboring shaft as and for the purposes specified.

In testimony whereof I have hereunto set my hand before two subscribingwitnesses.

S. WV. SHRYOGK. WVitnesses W. H. Moons, J r., PHIL ANDERSON.

